package edu.bluebeanforum.service.impl;

import com.sun.xml.internal.ws.util.StringUtils;
import edu.bluebeanforum.common.AppResult;
import edu.bluebeanforum.common.ResultCode;
import edu.bluebeanforum.exception.ApplicationException;
import edu.bluebeanforum.mapper.ArticleMapper;
import edu.bluebeanforum.model.Article;
import edu.bluebeanforum.model.Board;
import edu.bluebeanforum.model.User;
import edu.bluebeanforum.service.IArticleService;
import edu.bluebeanforum.service.IBoardService;
import edu.bluebeanforum.service.IUserService;
import edu.bluebeanforum.utils.StringUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.util.Base64;
import java.util.Date;
import java.util.List;

@Service
@Slf4j
public class ArticleServiceImpl implements IArticleService {
    @Resource
    private ArticleMapper articleMapper;
    @Resource
    private IUserService userService;
    @Resource
    private IBoardService boardService;

    @Override
    public void create(Article article) {
//        非空校验
        if(article==null||article.getUserId()==null||article.getBoardId()==null
        || StringUtil.isEmpty(article.getTitle())
        || StringUtil.isEmpty(article.getContent())){
            log.warn(ResultCode.FAILED_PARAMS_VALID.toString());
            throw  new ApplicationException(AppResult.fail(ResultCode.FAILED_PARAMS_VALID));
        }
//        设置默认值
        article.setVisitCount(0);
        article.setReplyCount(0);
        article.setLikeCount(0);
        article.setDeleteState((byte) 0);
        article.setState((byte) 0);
        Date date=new Date();
        article.setCreateTime(date);
        article.setUpdateTime(date);
//        写入数据库
        int row = articleMapper.insertSelective(article);
        if(row<=0){
            log.warn(ResultCode.FAILED_CREATE.toString());
            throw new ApplicationException(AppResult.fail(ResultCode.FAILED_CREATE));
        }
//        获取用户信息
        User user = userService.selectById(article.getUserId());
        if(user==null){
            log.warn(ResultCode.FAILED_CREATE.toString()+"发帖失败 user id"+article.getId());
            throw new ApplicationException(AppResult.fail(ResultCode.FAILED_CREATE));
        }
//        更新用户的发帖数
        userService.addOneArticleCountById(user.getId());

//        获取板块信息
        Board board=boardService.selectById(article.getBoardId());
        if(board==null){
            log.warn(ResultCode.FAILED_CREATE.toString()+"发帖失败 user id"+article.getId());
            throw new ApplicationException(AppResult.fail(ResultCode.FAILED_CREATE));
        }
//        更新板块的发帖数
        boardService.addOneArticleCountById(board.getId());

        log.info(ResultCode.SUCCESS.toString()+"user id"+article.getUserId()
        +"board id"+article.getBoardId()+"article id"+article.getId()+"发帖成功");

    }
    //    查询帖子列表
    @Override
    public List<Article> selectAll() {
       return articleMapper.selectAll();
    }

    @Override
    public List<Article> selectAllByBoardId(Long boardId) {
//        非空校验
        if (boardId == null || boardId <= 0) {
            log.warn(ResultCode.FAILED_PARAMS_VALID.toString());
            throw new ApplicationException(AppResult.fail(ResultCode.FAILED_PARAMS_VALID));
        }
//        校验板块是否存在
        Board board = boardService.selectById(boardId);
        if (board == null) {
            log.warn(ResultCode.FAILED_BOARD_NOT_EXISTS.toString());
            throw new ApplicationException(AppResult.fail(ResultCode.FAILED_BOARD_NOT_EXISTS));

        }
        return  articleMapper.selectAllByBoardId(boardId);
    }

    @Override
    public Article selectDetailById(Long id) {
 //        非空校验
        if (id == null || id <= 0) {
            log.warn(ResultCode.FAILED_PARAMS_VALID.toString());
            throw new ApplicationException(AppResult.fail(ResultCode.FAILED_PARAMS_VALID));
        }
        Article article = articleMapper.selectDetailById(id);
        if(article==null){
            log.warn(ResultCode.FAILED_ARTICLE_NOT_EXISTS.toString());
            throw new ApplicationException(AppResult.fail(ResultCode.FAILED_ARTICLE_NOT_EXISTS));
        }
//      更新帖子的访问次数
        Article updateArticle=new Article();
        updateArticle.setId(article.getId());
        updateArticle.setVisitCount(article.getVisitCount()+1);
//        保存到数据库----数据库中的article对象的访问次数+1
        int row = articleMapper.updateByPrimaryKeySelective(updateArticle);
        if (row!=1) {
            log.warn(ResultCode.ERROR_SERVICES.toString());
            throw new ApplicationException(AppResult.fail(ResultCode.ERROR_SERVICES));
        }
//        更新返回对象的访问次数————返回对象次数+1
        article.setVisitCount(article.getVisitCount()+1);
        return article;
    }

    //    根据帖子id查询帖子记录
    @Override
    public Article selectById(Long id) {
        if (id == null || id <= 0) {
            log.warn(ResultCode.FAILED_PARAMS_VALID.toString());
            throw new ApplicationException(AppResult.fail(ResultCode.FAILED_PARAMS_VALID));
        }
        Article article = articleMapper.selectByPrimaryKey(id);
        return article;

    }

    @Override
    public void modify(Long id, String title, String content) {
//        非空校验
        if(id==null||id<=0||StringUtil.isEmpty(title)||StringUtil.isEmpty(content)){
            log.warn(ResultCode.FAILED_PARAMS_VALID.toString());
            throw new ApplicationException(AppResult.fail(ResultCode.FAILED_PARAMS_VALID));

        }
//        构建要更新的帖子对象
        Article updateArticle=new Article();
        updateArticle.setId(id);
        updateArticle.setTitle(title);
        updateArticle.setContent(content);
        updateArticle.setUpdateTime(new Date());
//        调用Dao
        int row = articleMapper.updateByPrimaryKeySelective(updateArticle);
        if(row!=1){
            log.warn(ResultCode.ERROR_SERVICES.toString());
            throw new ApplicationException(AppResult.fail(ResultCode.ERROR_SERVICES));

        }

    }

    @Override
    public void thumbsUpById(Long id) {
        if (id == null || id <= 0) {
            log.warn(ResultCode.FAILED_PARAMS_VALID.toString());
            throw new ApplicationException(AppResult.fail(ResultCode.FAILED_PARAMS_VALID));
        }
//    获取帖子详情
        Article article = articleMapper.selectByPrimaryKey(id);
        if (article==null||article.getDeleteState()==1){
            log.warn(ResultCode.FAILED_ARTICLE_NOT_EXISTS.toString());
            throw new ApplicationException(AppResult.fail(ResultCode.FAILED_ARTICLE_NOT_EXISTS));
        }
        if(article.getState()==1){
            log.warn(ResultCode.FAILED_ARTICLE_BANNED.toString());
            throw new ApplicationException(AppResult.fail(ResultCode.FAILED_ARTICLE_BANNED));
        }
        //        构建要更新的帖子对象
        Article updateArticle=new Article();
        updateArticle.setId(article.getId());
        updateArticle.setLikeCount(article.getLikeCount()+1);
        updateArticle.setUpdateTime(new Date());
//        调用Dao
        int row = articleMapper.updateByPrimaryKeySelective(updateArticle);
        if(row!=1){
            log.warn(ResultCode.ERROR_SERVICES.toString());
            throw new ApplicationException(AppResult.fail(ResultCode.ERROR_SERVICES));

        }

    }

    @Override
    public void deleteById(Long id) {
        if (id == null || id <= 0) {
            log.warn(ResultCode.FAILED_PARAMS_VALID.toString());
            throw new ApplicationException(AppResult.fail(ResultCode.FAILED_PARAMS_VALID));
        }
        //    获取帖子详情
        Article article = articleMapper.selectByPrimaryKey(id);
        if (article==null||article.getDeleteState()==1){
            log.warn(ResultCode.FAILED_ARTICLE_NOT_EXISTS.toString());
            throw new ApplicationException(AppResult.fail(ResultCode.FAILED_ARTICLE_NOT_EXISTS));
        }
        //        构建要更新的帖子对象
        Article updateArticle=new Article();
        updateArticle.setId(article.getId());
        updateArticle.setDeleteState((byte) 1);
       //调用Mapper
        int row = articleMapper.updateByPrimaryKeySelective(updateArticle);
        if(row!=1) {
            log.warn(ResultCode.ERROR_SERVICES.toString());
            throw new ApplicationException(AppResult.fail(ResultCode.ERROR_SERVICES));
        }
        //更新板块中的帖子数
        boardService.subOneArticleCountById(article.getBoardId());
        //更新用户发帖数
        userService.subOneArticleCountById(article.getUserId());
        log.info("删除帖子成功");
    }

    @Override
    public void addOneReplyCountById(Long id) {
        //非空校验
        if (id == null || id <= 0) {
            log.warn(ResultCode.FAILED_PARAMS_VALID.toString());
            throw new ApplicationException(AppResult.fail(ResultCode.FAILED_PARAMS_VALID));
        }
        //获取帖子记录
        Article article = articleMapper.selectByPrimaryKey(id);
        //校验帖子状态
        if(article==null||article.getDeleteState()==1){
            log.warn(ResultCode.FAILED_BOARD_NOT_EXISTS.toString());
            throw new ApplicationException(AppResult.fail(ResultCode.FAILED_BOARD_NOT_EXISTS));
        }
        //帖子已封帖
        if(article.getState()==1){
            log.warn(ResultCode.FAILED_ARTICLE_BANNED.toString());
            throw new ApplicationException(AppResult.fail(ResultCode.FAILED_ARTICLE_BANNED));
        }
        //构造更新对象
        Article updateArticle=new Article();
        updateArticle.setId(article.getId());
        updateArticle.setReplyCount(article.getReplyCount()+1);
        updateArticle.setUpdateTime(new Date());
        //执行更新
        int row = articleMapper.updateByPrimaryKeySelective(updateArticle);
        if(row!=1){
            log.warn(ResultCode.ERROR_SERVICES.toString()+"受影响的行数不止一行");
            throw new ApplicationException(AppResult.fail(ResultCode.ERROR_SERVICES));
        }

    }

    @Override
    public List<Article> selectByUserId(Long userId) {
//        非空校验
        if(userId==null||userId<=0){
            log.warn(ResultCode.FAILED_PARAMS_VALID.toString());
            throw new ApplicationException(AppResult.fail(ResultCode.FAILED_PARAMS_VALID));
        }
//        校验用户是否存在
        User user=userService.selectById(userId);
        if(user==null){
            log.warn(ResultCode.FAILED_USER_NOT_EXISTS.toString());
            throw new ApplicationException(AppResult.fail(ResultCode.FAILED_USER_NOT_EXISTS));
        }
        List<Article> articles = articleMapper.selectByUserId(userId);
        return articles;

    }
}
